Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfea53cc29c28f0…

MALICIOUS

PDF

41.1 KB Created: 2020-10-03 15:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-19
MD5: 0166286ac5a92820d51a4d594840352e SHA-1: 5914918f9d0efc648ff43f31c50d263db12baf10 SHA-256: 6dfea53cc29c28f0e1fe2cc9bca5827491e0bc7cd603dadf01e71743ff54478e
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=speak+unit+lesson+plans In PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/34836783224.pdfIn PDF document text
    • https://site-1042016.mozfiles.com/files/1042016/69430686651.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/62500800327.pdfIn PDF document text
    • https://site-1037177.mozfiles.com/files/1037177/53333597821.pdfIn PDF document text
    • https://site-1037221.mozfiles.com/files/1037221/fujaxakanutikejemakexiwo.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/felelamafemex.pdfIn PDF document text
    • https://site-1036855.mozfiles.com/files/1036855/43166827992.pdfIn PDF document text
    • https://site-1036951.mozfiles.com/files/1036951/25807143492.pdfIn PDF document text
    • https://site-1038915.mozfiles.com/files/1038915/14202338391.pdfIn PDF document text
    • https://site-1038788.mozfiles.com/files/1038788/21415139978.pdfIn PDF document text
    • https://site-1037860.mozfiles.com/files/1037860/nurodubijudulemabaninaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000650e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000650e.bin)
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off0000650e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650E 4884 bytes
SHA-256: 9cdd10036a107a33c7612dd8f92f2164f0226af922cb0f7ca2bd59a461d90ac4
font_01_sfnt_off000075c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C0 10064 bytes
SHA-256: a78ef23778c92a5a315faf51e15409ffebb59b0dbd19d07dd24462f087c93b2a